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CYLINDER COCK.

APPLICATION FILED FEB. 26.1919. i Patented Nov. 25,1919.

A TTORN LOTTIE 1?. LIGON, OF ROANOKE, VIRGINIA.

CYLINDER-COCK.

., Specification of Letters Patent.

Patented Nov. 25, 1919.

Application filed February 26, 1919. Serial No. 279,384.

To all whom it may concern: 7

Be it known that I, LOTTIE P. LIGON, a citizen of the United States, andresident of Roanoke, in the county of Roanoke and State of Virginia,have invented certain new and useful Improvements in Cylinder- Cocks, ofwhich the following is a specification.

The present invention relates to cylinder cocks, such as are used fordraining the cylinders of locomotives and the like, and the object ofthe invention is to provide a cylinder cup comprising a valve and bodyor casing of novel construction, and novel operating means for thevalve, whereby the de vice. is thoroughly practical and efficient inuse.

A further object is the provision of such a device which will lock thevalve when closed, so as to prevent the inlet of air to the cylinder andalso prevent the valve from hammering on the seat when the engine isdrifting.

It is also the object to provide a cylinder cock having the featuresabove noted, and which at the same time is comparatively simple andinexpensive in construction, and substantial and durable so as not to beapt to get out of order.

With the foregoing and other objects in view which will be apparent asthe descrip tion proceeds, the invention resides in the construction andarrangement of parts hereinafter described and claimed, it beingunderstood that changes can be made within the scope of what is claimedwithout depar ing from the spirit of the invention.

The invention is illustrated in the accompanying drawing, wherein Figure1 is a vertical median section of the device, the operating bar or slidebeing shown in elevation and being partly broken away, with the valveseated.

Fig. 2 is a similar view showing the valve unseated.

Fig. 3 is a bottom plan view of the valve and its casing or body.

The body or casing 1 of the cylinder cock is tubular and disposedvertical as usual, the upper end of the body or casing 1 being screwthreaded, as at 2, or otherwise formed for attachment to the cylinder,in order that the condensation will drain from the cylinder down intothe body 1. This body 1 is provided between its upper and lower endswith an interior annular flange 3 having an upper beveled valve seat 4,and the body has an'enlarged chamber 5 below the flange 3 and a centralvertical bore 6 extending from the chamber 5 to the lower end of thebody to provide a guide for the valve. The body 1 is provided at oneside with a longi- .tudinal or vertical slot 7 extending from ingsurrounded by the valve seat 4, said neck 10 having a valve head 11 atits upper end above the seat. The lower surface of the head 11 isbeveled to fit the seat 4 and provide a tight fit, as seen in Fig. 1.The shank or stem 9 has a dianietrical slot 12 between and registeringwith the slots 7 and 15: for the passage of the operating slide or Theoperating means includes a bar or slide 13 projecting through the slots7 8 and 12 with its lower edge seating on the lower end of the slot 8 tosupport said bar. The upper edge of the bar 13 is cut away as at 14, toallow the valve to drop down and seat, as seen in Fig. 1, and one end ofthe cut away portion or recess 14 is inclined to provide a cam 15 forlifting the valve. Thus, when the bar or slide 13 is moved toward theleft as viewed in the drawing, the cam 15 in contacting with the valvewill lift it to the position shown in Fig. 2, thus permitting the waterto drain from the cylinder through the valve seat opening, chamber 5 andslot 7 which forms a discharge outlet. At that end of the cut awayportion or recess 14 opposite to the cam 15, there is an upstanding lugor stop 16 that moves snugly under the upper end of the slot 7 when thebar or slide 13 is returned, thus preventing said bar or slide fromlifting or raising when the cut away portion 14 moves under the upperend of the slot 8. In order to lock the valve on its seat, the bar orslide 13 is provided with a widened or depending portion or lip 17 belowthe lug 16 and cut away portion or recess 14 and movable snugly over thelower end of the slot 12 as seen in Fig. 1, when the valve is seated,thereby holding the valve on its seat, and preventing the valve frombeing drawn lOO 7 open by the suction created in the cylinder.

This will prevent the inlet of air into the cylinder, and will alsoprevent the valve from hammering on its seat when the en gine isdrifting. Y

The bar or slide 15 can be bolted or otherwise fastened to an operatingbar 18 for connecting the slide 15 with the "slide of another cylindercock when they are used in pairsfand any suitable means can be used foroperating the slides, according to the prevailing practice.

Having thus described the invention, what is claimed as new is Acylinder cock comprising .a tubular "body having a valve seat and slotsbelow 'said seat, a valve having a shank slidable -in-saidbody below theseat and having a valve head at its upper end seatable on said seat,said shank having a slot, and a slide extending through all said slotsand having a-recess in its upper edge with a cam at one end of therecess to lift the valve and an upstanding lug at the opposite end ofthe recess to move snugly under the upper end of the corresponding slotin the body, said slide, having a depending portion below said recess tomove into the slotof said shank close to "the lower end thereof whensaid'lug moves into the body for holding the valve head on the seat.

In testimony whereof I hereunto set my hand.

LOTTIE P. LIGO N. 1

